Pipe and means for connecting same



E. T. GREENFIELD.

PIPE AND MEANS FOR CONNECTING SAME.

APPLICATION FILED NOV. 2, 19I8.

1 3 44, 032 I Patented June 22, 1920.

g I I INVENTOR 6 ATTORNEYJ UNITED STATES PATENT or EDWIN r. GREENFIELD, or .YONKERS, NEW YORK; MARY n.

GBEENFIELD ADMINIS- TRATRIX OI SAID-EDWIN T. GBEENFIELD, DECEASED.

PIPE AND MEANS FOR CON'NECTINGBAHE.

To all whom it may concern:

Be it known that I, EDWIN T. GREEN- FIELD, a citizen of the United States, and a vented certain new and useful Improve-' ments in Pipes and Mean's'for Connecting Same, of which the-following is a specification.

The invention relates to a pipe as an article of manufacture provided with means whereby sections of said pipe may be readily secured together by ordinary threaded coupling means;

My invention is particularly adapted for use in connection with electric conduit pipes whereby sections of the same may be readily coupled together.

One of the objects of my invention is to provide a pipewith coupling means which shall save labor and avoid the use of thread cutting apparatus, as compared with ordi- I nary screw couplings, which shall not deform the pipe like clamp couplings, which shall be effective for its purpose, and which.

shall be practical and inex ensive'from a manufacturing standpoint. 0 this end the pipe is preferably provided or formed with f a series of protuberances which act in place of a thread for cooperation with a threaded is usually cut on the job to the various lengths required by the particular piece of work in hand, and where screw couplings are employed it has heretofore been nec- .essary or the workmen to carry a tappin device and with it to form screw threa s on the ends of the cut pipe, which is a more or less expensive. operation,'or if thepipe sections be connected together by clamp cou plings-the same often give way under a straln placed upon'the pipe.

In accordance with the present inventio the pipe is preferably provided with a longitudinal series of protuberances extendcoupling member. These protuberances are preferably placed upon the pipe at the time of manufacture and, extending throughout its length, afford ready-made means of connection at any point where thepipe may be cut.

Other objects of my invention will appear from the drawings and from the detailed description to follow.

In the accompanying drawings forming a part hereof V Figure 1 is a side elevation of coupled portions of two sections of pipe, each provided with a series of protuberances, and'a connecting member uniting said portions.

Fig. 2 is a longitudinal sectionthrough the coupling; and V Fig. 3 is a cross-section on the line 33 of Fig. 2. I

The drawing shows two pipe sections 1 of indefinite length, and an ordinary couplin sleeve 2 having internal screw threads 3. n the case of electric conduits the pipe ing the full len h of the pipe, and constitutmg means w ereby the pipe can be out at any point, whereupon the end thus formed will present preexisting coupling formations of ample, because indefinite, extent lengthwise 0 the ipe. The workman thereforehas nothing I urther to do but to screw the ends of the pipe and the couplin member together. For this purpose, it wi be understood, the protuberances are prefer ably made of such size, shape and spacin as will enable them to en age the standar threads used in these coup ing members. As

illustrated, they are round or of spot-like proportions in plan, spaced one-eighthof an inch apart, so as to cooperate, with the rightor lefthand threaded coupling memberhaving'a No. 8 thread. In a perpew dicul-ar section they may be rounded or straight-tapering, or any other figuration whereby they .will cooperate with the threads of standard commercial coupling members.

Various methods may be adopted for making the protuberances, and depending upon the procedure employed they may project from the solid wall of the pipe as shown, the interior surface of the pipe being smooth, or they may be struck up or bent out from the metal leaving depressions within. The connection can be readily made water-tight by wrapping suitable packing material around the ends of the pipe sections before screwing up the. coupling.

What I claim as new is: I

1. As an article of manufacture, a single piece pipe provided with a series of equally spaced protuberances extending length of the pipe and adapte to cooperrice;

Specification)! Lettersl'atent. Patented Jull 22 1920. Application filed November 2,1918. Serial 110,1 0,301;

the entire ate at any point throughout its length with This specificlation signed and witnessed the tlfixreads of a COlflPllIlg inember. this 31st day of October, A. D. 1918.

2. s an article 0 menu acture a single 1 piece pipe shaped to provide a series of EPWIN GRELNFIELD' 5 equally spaced protuberances throughout Signed in the presence ofits entire length which protuberances serve G. MOGRANN,

at any section in lieu of screw threads. W. C. MARGESON. 

